Velocity measurements of the laminar flow through a rotating straight pipe
Journal
Physics of Fluids
Journal Volume
6
Journal Issue
6
Pages
1972-1982
Date Issued
1994
Author(s)
Abstract
Some measurements have been obtained for the axial velocity of the fully developed laminar flow in a circular straight pipe with radius a, which is rotating with constant angular speed �[ about an axis perpendicular to its own axis. A diode laser LDA system was mounted together with a circulating pipe flow system on a rotating table for the experiment. According to previous analyses and calculations, there exist four types of axial velocity distributions that result from the various effects of the secondary flow on the main stream via the convection and Coriolis effect for different values of R( = wm��a/�h) and R�[(=�[a2/�h), where wm�� is the mean axial velocity and �h is the kinematic viscosity of the fluid. The present study provides experimental validation for the previous theoretical and numerical analyses. Experiments have also been carried out for studying the asymptotic nature of the slow flow in a rapidly rotating pipe (R�[?1 and R�[?R) and the rapid flow in a slowly rotating pipe (RR�[?1 and R?R�[).
Type
journal article